Sheet-metal piling



June 4, 1929. FQRAUWALD 4 I SHEET METAL FILING 3 Sheets-Sheet 1 Filed Nov. 26, 1927 1 w t n 1. c 11 i m 1 1 1 1 1 3? 17 1 2; 2 F K 1 fi lj' I, 6 0 I I 1 1 w 1 1 w 1 1 1 1 June 4, 1929. F. RAUWALD SHEET METAL FILING Filed Nov. 26, 1927 3 Sheets-Sheet 2 June 4, 1929. F. RAUWALD SHEET METAL FILING Filed Nov. 26, 1927 I5 Sheets-Sheet 3 .Zhventor Fatented June 4, 1929.

UETED Stir FERDINAND RAUVIALD, OF 'ESSEN, GERMANY.

SHEET-METAL FILING.

Application filed November 26', 1927, Serial No. 235,969, and in: Germany November 27, 1926.

It has been proposed to construct walls,

of sheet metal piling by setting up pairs of standard sections with their open or concave sides face to face to form boxes, and connectingeach pair together and also to the adjacent box sections by means of looking bars.

According to the present invention the .construction of such hollow or box piles is considerably simplified by dispensing entirely with the aforesaid locking bars, the sections constituting each box having looking members which both hold them together and also form the means of attachment to the adjacent box sections.

Such locking members may take Various forms some of which are illustrated, by way 'box has, at each of its ends, a locking member b (hereinafter termed the outer locking member) which is bent round twice at approximately right angles to form a channel open towards the inner side and in which channel engages the oppositely disposed section 0 of the box by means of a bent locking member (Z (hereinafter termed the inner locking member). The external dimensions of each inner locking member (Z correspond to the interior dimensions of each outer locking member I). The inner locking members (Z are wedge-shaped at the ends as clearly shown in the figure.

To form a wall two sections a and 0 are first inter-connected to constitute a box or hollow pile and this is rammed; thereafter two further sections are connected together .in a similar way and, after their locking members have been inserted into the residual opening in one of the locking members d of the previously rammed box, they too are rammed; and so on.

In the constructions illustrated by Figs. 2 and 8, the inner locking members d are left end.

plain, that is to'say', they are ofuniform thickness v throughout, whereby smaller amounts of metal are required in the locking members. Moreover, the locking members in Fig. 2 are so designed that only one type of section is needed. In other words, the sections a and '0 in Fig. 2 are similar, each having an outer locking member 6 at one end and an inner locking member d at the opposite end. The two similar sections are placed together in reversed manner to form a box in which an inner locking member 03 engages an outer locking member I) at each The construction according to Fig. 3, like the construction according to Fig. 1, has two outer locking members I) on the one pile element a and two inner locking members d on the oo-acting pile element 0 of v each box.

Having now fully described my invention, what I claim and desire to secure by Letters; Patent is 1. A box pile comprising directly interconnected pairs of opposing sheet pile sections, said sections having inter-engaging inner and outer marginal channel-shaped locking member-portions fitting complementarily together without other fastening means.

2. A box pile comprising cooperable sheet metal sections of similar form connected in opposed relation, said sections having interenga'ging inner and outer channel-shaped locking members, one of said sections having an outer locking member at each end and the other of said sections having an inner locking member at each end. 7

3. A box pile comprising sheet metal sections of similar form connected in opposing pairs cooperatively related, said section's being directly inter-engaged by inner andouter channel-shaped locking portions of; the opposed pairs with an outer and an inner locking portion at each end. I

4. A pile wall comprising sheet metal pile sections set up in pairs to form adjacent boxes, and locking members on the sections inter-engaging to hold each pair together to form a box'and also constituting a means of attachment to the adjacent box sections:

5. A pile wall comprising pile sections set up in pairs to form adjacent boxes, and channel-shaped locking members on the sections inter-engaging to hold eachv pair together to form a box and also constituting the means of attachment to the sections forming the adjacent boxes.

6. A pile Wall comprising pile sections set up in pairs to form adjacent boxes, and inter-engaging inner and outer channelshaped locking members on the sections of each box, the locking members of the one box inter-engaging With the locking members of the adjacent boxes.

7. A pile Wall comprising similar sections set up in pairs to form adjacent boxes, and inter-engaging inner and outer channelshaped locking members on the sections of each pair, the locking members of the one box inter-engaging With the locking mem bers of the adjacent boxes. 7 1

In testimony whereof I have afiixed my signature.

FERDINAND RAUWALD. 

